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Planetary RadioJuly 21, 2015

Planetary Radio Live at the New Horizons Pluto Encounter

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On This Episode
Headshot of Bruce Betts
Bruce Betts

Chief Scientist / LightSail Program Manager, The Planetary Society

Headshot of Jim Bell
Jim Bell

President, Board of Directors of The Planetary Society; Mastcam-Z Principal Investigator; Professor, School of Earth and Space Exploration, Arizona State University

Mike Brown
Mike Brown

Planetary Astronomer, California Institute of Technology

Headshot of Emily Lakdawalla (2017, alternate)
Emily Lakdawalla

Senior Editor and Planetary Evangelist, The Planetary Society

Bill Nye headshot
Bill Nye

Chief Executive Officer, The Planetary Society

Linda Spilker
Linda Spilker

Cassini Project Scientist, Jet Propulsion Laboratory

Join our live audience for highlights of an amazing evening, featuring Jim Bell, Bruce Betts, Mike Brown, Emily Lakdawalla, Linda Spilker, and Bill Nye the Science Guy. Emily returns to provide the latest news from New Horizons as it voyages beyond Pluto. We close, as usual, with What’s Up and a new space trivia contest.

Mat Kaplan and guests wait for New Horizons to phone home from Pluto

Southern California Public Radio

Mat Kaplan and guests wait for New Horizons to phone home from Pluto

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Trivia Contest

This week's prizes are a fabulous Planetary Radio t-shirt and a 200-point account for remote use of their worldwide network of telescopes.

This week's question:

As of July 14th, what was the unofficial name given by the New Horizons team to the dark feature that some have also unofficially called “The Whale?”

To submit your answer:

Complete the contest entry form at or write to us at no later than Tuesday, July 28th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

What was the mass of the plutonium flown on New Horizons?


The answer will be revealed next week.

Question from the week before:

Of the five moons of Pluto known before New Horizons, which two moons have a mythological family relationship?


Pluto last passed outside the orbit of Neptune in 1999.

Listen more: New Horizons, Pluto, Planetary Radio Live, Charon, mission status, Planetary Radio, Bill Nye

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